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Human and Ecological Risk Assessment - Earthjustice

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Appendix EAttachment E-1: Surface Water ConcentrationsTable E-1-6. Gas-Phase Transfer Coefficient - Lakes (m/day) (Mercury Only)K gasgas−0.670.33k a= uCK ×××µwd× 864002 × DRLaaName Description ValueC d Drag coefficient (unitless)0.0011D a Diffusivity of chemical in air (cm^2/s)Chemical Data; See Section 3, Table 3-4k von Karman's constant (unitless)0.4L 2 Viscous sublayer thickness (unitless)4µ A Viscosity of air (g/cm-s)0.000181R a Density of air (g/cm^3)0.0012u wMean annual wind speed (m/sec)Site Data; See Appendix C86400 Conversion factor (sec/day)April 2010–Draft EPA document.E-1-6

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